The problem comes up often but is always the case with Adsense and Blogads <script>, all video embed code from any NBC source, and some others.
I go to the html source in the editor, paste in the code, switch to the WYS editor and the code changes, sometimes so much all the code disappears or is replace by code for a space. In fact adsense code is reduced to a tiny line of script that doesnt work at all. There is a way out with adsense by using the adsense plugin, but many of the other problems I run into I cant seem to find a solution.
I think I am missing something!
thanx,
RJ